3. The genetic code is commaless, which means that no codon is reserved for punctuations. It means that after one amino acid is coded, the second amino acid will be automatically, coded by the next three letters and that no letters are wasted as the punctuation marks (Fig.
Summer solstice is the first day of summer - it's usually between June 20th and June 23rd. In 2016, the summer solstice takes place on June 20th. We know it's summer because the earth's axis tilts toward the sun from June to September - this means warmer weather and longer days.
Hence the notion of a solstice day is useful. The term is colloquially used like midsummer to refer to the day on which solstice occurs. The summer solstice day has the longest period of daylight â except in the polar regions, where daylight is continuous, from a few days to six months around the summer solstice. 2016 was the first time in nearly 70 years that a full moon and the summer solstice concur on the same day.